﻿using Microsoft.Extensions.Configuration;
using Microsoft.IdentityModel.Tokens;
using System;
using System.Collections.Generic;
using System.IdentityModel.Tokens.Jwt;
using System.Linq;
using System.Security.Claims;
using System.Text;
using System.Threading.Tasks;

namespace Architecture.Common
{
    /// <summary>
    /// JWT扩展方法()
    /// </summary>
    public class JwtTools
    {
        /// <summary>
        /// 签发Token令牌
        /// </summary>
        /// <param name="_configuration">配置接口</param>
        /// <param name="uid">用户唯一标识</param>
        /// <returns></returns>
        public string JwtNewString(IConfiguration _configuration,string uid)
        {
            //Header,选择签名算法
            var signingAlogorithm = SecurityAlgorithms.HmacSha256;
            //Payload,存放用户信息,下面我们放了一个用户id (uid)
            var claims = new[]
            {
                new Claim(JwtRegisteredClaimNames.Sub,uid),
                new Claim(ClaimTypes.Name,"张三"),
                new Claim(ClaimTypes.Email,"zhangsan@example.com"),
                new Claim(ClaimTypes.Role,"Admin"),
                new Claim(ClaimTypes.DateOfBirth,"1980-01-01",ClaimValueTypes.Date),
                new Claim("CustomClaimType","CustomValue"),
                new Claim("Key","value值")
                //new Claaim(ClaimTypes.Role,"admin")
            };
            //取出私钥并以utf8编码字节输出
            var secretByte = Encoding.UTF8.GetBytes(_configuration["Authentication:SecretKey"]);
            //适应非对称算法对私钥进行加密
            var signingKey =new SymmetricSecurityKey(secretByte);
            //使用Hmacsha256来验证加密后的私钥生成数字签名
            var signingCredentials = new SigningCredentials(signingKey, signingAlogorithm);
            //生成Token
            var Token = new JwtSecurityToken(
                issuer : _configuration["Authentication:Issuer"],  //发布者
                audience: _configuration["Authentication:Audience"],//接受者
                claims:claims,                                          //存放的用户信息
                notBefore:DateTime.UtcNow,                        //发布时间
                expires:DateTime.UtcNow.AddDays(1),       //有效期设置为1天
                signingCredentials                   //数字签名

            );
            //生成字符串Token
            var TokenStr=new JwtSecurityTokenHandler().WriteToken(Token);

            return TokenStr;
        }
    }
}
